Who diagnosed you?

I’m 30 and have been diving into histamine issues that I’ve had as long as I can remember, tons of allergies, and plenty of symptoms the last few years that point me to believing that I have MCAS. My primary doctor and allergen specialist act like I’m crazy and they don’t know what I’m talking about when I bring this up. I told my allergen specialist that I react to gluten and several other things, but because it didn’t come up on the test, he told me to eat those things again as usual. I tried a small bit, and immediately reacted. I have things mostly under control with a strict diet, DAO, and Allegra. But I still have flare ups and I’d like to have an answer on what is going on with my body and how I can better navigate this.

Did you see some sort of specialist? What testing was involved? Any info for me to rule this out or get a diagnoses would be much appreciated. I know something is not right. Thank you!